1. Fitness square dance has the value of exercise. Square dance has the value of exercising. Regular line dancing exercises can improve cardiovascular and respiratory system, improve cardiopulmonary function, accelerate metabolic process, promote digestion, and eliminate brain fatigue and mental stress, so as to achieve good fitness effects such as strengthening physique, improving health, delaying decline and improving human activity ability. 2. Mental Construction From a psychological point of view, people's attention is the direction and concentration of psychological activities on an object, which means that attention is restricted by direction. In the process of dancing, their attention must be focused on appreciating elegant dance music and expressing their inner feelings along the rhythm. Due to the shift of attention, the functions of other parts of the body can be adjusted and fully rested. Therefore, participating in line dancing can eliminate tension and relieve stress. Practitioners can eliminate fatigue, cultivate the mind and feel happy emotions in beautiful music and wonderful dance, so as to achieve the best psychological state. 3. Brain memory is the reflection of past experiences in the human brain. It includes four basic processes: memory, retention, reproduction and recall. Its forms include image memory, concept memory, logical memory, emotional memory, sports memory and so on. In the practice of choreography, we should not only use image memory and concept memory, but also use emotional memory and sports memory. With the continuous growth of age, memory will decline at a very slow speed, which is a natural law and a normal phenomenon. Constantly stimulating the cranial nerves through choreography can slow down the physiological phenomenon of memory loss and achieve good brain-strengthening effect. 4. The practice of fitness square dance is to dance with the soul in the beautiful music melody, inject delicate emotions into the dance, show all kinds of dynamic and static postures with superb dance skills, shape all kinds of wonderful artistic conception combinations, reflect beautiful posture and beautiful modeling, and create artistic conception which is highly combined with sports and art, health and strength, giving people artistic edification and beautiful enjoyment. Therefore, square dance practice has higher requirements for shape, posture and health. Regular participation in line dance practice is a good physical exercise, which can improve the coordination ability of the human body, strengthen the muscle groups of all parts of the body, increase bone density, and has a very positive bodybuilding effect. This answer refers to Square Dance Network:/